This study evaluated Automated Telephone Disease Management (ATDM) calls with telephone nurse follow-up as a means of improving the quality of VA diabetes care. Specifically, we will determine whether this service improves patients' glucose control; improves other important outcomes such as their quality of life, satisfaction with care, and health service use; improves health behaviors such as self-monitoring of blood glucose, fat intake, and medication adherence; and has effects that vary across patient subgroups.